Abstract:
A monolithic catalyst for simultaneous removal of NOx and carbon particles, especially from off-gases of carbon power plants contains the monolith is made from acid-proof austenitic steel. The catalyst is a two-phase one; moreover, it contains the phases NiFe2O4 and Fe2O3(Mh) with spinel structure, and these phases form microcrystallites, additionally containing Mn.The manner of production of the monolithic catalyst for simultaneous removal of NOx and carbon particles, especially from off-gases of carbon power plants depends on the monolith is subject to oxidation after which the resulting oxide layers are washed with the solution of nickel salts; later the monolith is baked in the oxidising atmosphere with the view to inserting nickel ions into the oxide layer; finally this obtained oxide layers are subject to reduction.
Abstract translation:用于同时去除NOx和碳颗粒的整体式催化剂,特别是从碳发电厂的废气中排出的整体式催化剂包含由耐酸奥氏体钢制成的整料。 催化剂是两相的; 此外,它包含具有尖晶石结构的NiFe 2 O 4和Fe 2 O 3(Mh)相,并且这些相形成微晶,另外含有Mn。 用于同时去除NOx和碳颗粒,特别是碳发电厂废气的整体式催化剂的生产方式取决于整体是否经历氧化,之后用镍盐溶液洗涤所得到的氧化物层; 之后,在氧化气氛中烘烤整料,以便将镍离子插入到氧化物层中; 最终得到的氧化物层被还原。
Abstract:
The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.
Abstract:
Disclosed are hierarchically porous carbon materials with a plurality of discreet nanoparticles dispersed on their carbon phase. The materials possess a continuous network of pores that spans the porous material, permitting the flow of fluids into and through the material. The porous materials can be used as heterogeneous catalysts.
Abstract:
A process has been developed for preparing a Fischer-Tropsch catalyst precursor and a Fischer-Tropsch catalyst made from the precursor. The process includes contacting a gamma alumina catalyst support material with a first solution containing a compound containing zinc and optionally containing P, Ti, V, Co, Ga, Ge, Mo, W and/or Pr to obtain a modified catalyst support material. The modified catalyst support material is calcined at a temperature of at least 500° C. The calcined modified catalyst support has a pore volume of at least 0.4 cc/g. The modified catalyst support is less soluble in acid solutions than an equivalent unmodified catalyst support. The modified catalyst support is contacted with a second solution which includes a precursor compound of an active cobalt catalyst component to obtain a catalyst precursor. The catalyst precursor is reduced to activate the catalyst precursor to obtain the Fischer-Tropsch catalyst. The catalyst has enhanced hydrothermal stability as measured by losing no more than 20% of its pore volume when exposed to water vapor.
Abstract:
The invention relates to a CO oxidation promoter additive and a method of its preparation. The CO oxidation promoter additive is having improved apparent bulk density and attrition properties for use in hydrocarbon conversion during fluid catalytic cracking. The CO oxidation promoter additive has a better CO to CO2 conversion.
Abstract:
Heavy oil feeds are hydroprocessed in the presence of a solvent under conditions that provide a variety of benefits. The solvent can be an added solvent or a portion of the liquid effluent from hydroprocessing. The processes allow for lower pressure processing of heavy oil feeds for extended processing times or extended catalyst lifetimes be reducing or mitigating the amount of coke formation on the hydroprocessing catalyst.
Abstract:
A composition having a substantial or material absence of or no phosphorous and comprising a support material, a metal compound and either a hydrocarbon oil or a polar additive or a combination of both a hydrocarbon oil and polar additive. The polar additive has particularly defined properties including having a dipole moment of at least 0.45. The composition is useful in the hydroprocessing of hydrocarbon feedstocks, and it is especially useful in the hydrotreating of vacuum gas oils and petroleum resid feedstocks.
Abstract:
Integrated Combustion Reactors (ICRs) and methods of making ICRs are described in which combustion chambers (or channels) are in direct thermal contact to reaction chambers for an endothermic reaction. Particular reactor designs are also described. Processes of conducting reactions in integrated combustion reactors are described and results presented. Some of these processes are characterized by unexpected and superior results, and/or results that can not be achieved with any prior art devices.
Abstract:
A process is disclosed for preparing a Fischer-Tropsch catalyst precursor and a catalyst made from the precursor. The process includes contacting an alumina catalyst support material with a first solution containing a vanadium compound and a phosphorus compound, to obtain a modified catalyst support material. The modified catalyst support material is calcined at a temperature of at least 500° C. The calcined modified catalyst support has a pore volume of at least 0.4 cc/g. The modified catalyst support is less soluble in acid solutions than an equivalent unmodified catalyst support. The modified catalyst support is contacted with a second solution which includes a precursor compound of an active cobalt catalyst component and glutaric acid to obtain a catalyst precursor. The catalyst precursor is reduced to activate the catalyst precursor to obtain the Fischer-Tropsch catalyst. The catalyst has enhanced hydrothermal stability and good activity.
Abstract:
The present invention is directed to an improved hydrocracking catalyst containing a amorphous silica-alumina (ASA) base and alumina support. The ASA base is characterized as having a high nanopore volume and low particle density. The alumina support is characterized as having a high total nanopore volume. Hydrocracking catalysts employing the combination high nanopore volume ASA base and alumina support exhibit improved hydrogen efficiency, and greater product yield and quality, as compared to hydrocracking catalysts containing conventional ASA base and alumina components.